<template>
    <div class="icons">
        <swiper :options="swiperOption">
            <swiper-slide v-for="(item,index) in pages" :key="item.id">
                <div class="icon" v-for="child in item">
                    <div class="icon-img">
                        <img class="icon-img-content" :src="child.imgUrl" >
                    </div>          
                    <p class="icon-desc">{{child.desc}}</p>
                </div>
            </swiper-slide>
        </swiper>       
    </div>
</template>

<script>
export default {
  props: {
    lattice: Array
  },
  data() {
    return {
        swiperOption:{
           autoplay : false
        }
    };
  },
  mounted() {},
  methods: {},
  computed: {
    pages() {
      const pages = [];
      this.lattice.forEach((item, index) => {
        const page = Math.floor(index / 8);
        if (!pages[page]) {
          pages[page] = [];
        }
        pages[page].push(item);
      });
      return pages;
    }
  }
};
</script>

<style lang="stylus" scoped>
.icons>>>.swiper-container {
    height: 0;
    padding-bottom: 50%;

    .icon {
        position: relative;
        overflow: hidden;
        float: left;
        width: 25%;
        height: 0;
        padding-bottom: 25%;

        .icon-img {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0.44rem;
            box-sizing: border-box;
            padding: 0.05rem;

            .icon-img-content {
                display: block;
                margin: 0 auto;
                height: 100%;
            }
        }

        .icon-desc {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 0.44rem;
            line-height: 0.44rem;
            text-align: center;
            color: #333;
        }
    }
}
</style>